The distance from dr. suzuki’s office in miles

Ineed to know the answer right now! !

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

Lucy spent $165 in december using a new credit card. in january, she began paying between $15 and $25 each month towards her account balance.